Door and window opening tool



Oct. 30, 1934. Q, ELLls 1,978,743

DOOR AND WINDOW OPENING TOOL Filed June 12, 1933 Patented Oct. 30, 1934PATENT OFFICE Claims.

The invention relates to improvements in door and window openers, suchas now used by city and State fire departments, in which a cam isactuated by means of a hand lever.

The object of the improvements is, first, to provide a simple means ofholding a cam in position against a door or window sill, and second, toprovide a means whereby the action of the cam will compel its holdingmeans to firmly engage a door or a window frame and at the same timeforce the dooror window open when the tool is applied to either. In thecase of a door to be opened, the holding means would engage the part ofthe frame known as the jamb. I realize that there are other door openershaving a holding means which engages the door jamb. They, however, relyupon taking hold of a part of the jamb known as the door stop. After thestop has been torn off, the tool becomes inoperative, so that anotherobject of my invention is to provide a holding means that will engage ajamb lacking a stop or in the event where the stop has been torn offfrom the jamb.

One form of the invention is illustrated in the accompanying drawing inwhich Fig. l is a front view and Fig. 2 is a side view, both showing camand holding means, also part of the lever; Fig. 3, a view of the face ofthe cam with a spirally mounted blade; Fig. 4, a sectional view on line44 of Fig. 2 showing the cam held in position against a door, andlateral teeth on the plate forced into the woodwork of a door jamb; alsothe spiral runner blade on the face of the cam engaging the door.

The cam 1 is actuated by lever 3. 3 is mounted upon pivot 4. 4 isintegrally mounted on plate 5. 5 is provided with lateral teeth 6 and 7on the opposite face. Said teeth are forced into and engage a door framewhen the cam is rotated. 8 is a claw which may be used for variouspurposes, 9 shows the section of a door frame, and 10 the section of adoor.

The feature of this invention is clearly shown in Fig. 3 and Fig. 4,where a spiral blade is shown upon the face of a cam 1, and. how thespiral blade engages in a door. It will be readily understood that whenpoint X on the spiral blade engages in a door and rotates to point Y(see Fig. 3) the blade will form a track in the door, and the bladefollowing in its self-made track will force the entire cam 1 against theplate 5. Thus pressure is brought to bear upon the plate and will forcelateral teeth 6 and 7 on the thereby providing a sufiicient means ofholding the cam in position, and as this sideways motion is in process,it will be noted that the face of the cam 1 bears against the door andthe distance between the pivot pin 4 is gradually increased as the camrotates forcing the door open, thus two operations being performed atthe same time; namely, the holding means, consisting of a plate, a pivotpin and lateral teeth, is forced to take hold of the door frame whilethe door is being forced open by the action of the cam. Because of thesideways action of the blade, and the forward action of the cam, and theblade being an integral portion of the cam, we will refer to thiscombination of a blade and a cam as a dualaction ca I am aware that,prior to my invention, door openers having a cam, a lever attached, andprovided with a means of holding same in position, have been made. I,therefore, do not claim such a combination broadly.

I claim:

1. The combination in a door opener, a lever, a dual-action cam portionformed integral therewith and adapted for abutment against a door to beopened, a holding means comprising a plate, teeth extending from oneface thereof, a pivot pin extending from the opposite face thereof, saidcam mounted upon said pivot pin, the aforesaid teeth being adapted toengage a door frame regardless of the presence of a door stop.

2. The combination in a door opener having a lever, a dual-action camportion formed integral therewith, said cam portion having a faceadapted for abutment against a door to be opened, a spiral bladeintegrally mounted upon said face to engage the door and impart asideways motion to the entire door opener, a holding means comprising aplate, teeth extending from one face thereof, said teeth positioned toengage the door frame and eliminate stress upon the door stop, theaforesaid cam pivotally connected to said holding means.

3. A combination in a door opener as described, comprising a cam havinga face, adapted for abutment against a door to be opened, a holdingmeans to engage the door frame, said cam pivotally mounted upon saidholding means, a spiral blade integrally mounted upon the face of thecam to engage the door and act in conjunction therewith and transverselythereto, to press the holding means into position compelling itsengagement with the door frame.

4. The combination in a door opener, a holding means consisting of aplate, teeth extending from one face thereof to engage a door frame, a

pivot pin extending from the opposite face, a cam having a face adaptedfor abutment against a door to be opened, said cam mounted upon saidpivot pin, a spiral blade integrally mounted upon the face of said camand adapted to engage the door, said blade acting in conjunction withsaid cam to impart a transverse motion to the door in opposition to theaforesaid holding means.

5. The combination in a door-opener, a holding means to engage a doorframe, a cam having a

